/Engine/Plugins/Runtime/GeometryProcessing/Source/DynamicMesh/Public/Selections/GeometrySelection.h
Add the items in the List to the Target Selection and return change information in DeltaOut
template<typename ListType> bool Select ( const ListType & List, [FGeometrySelectionDelta](API\Plugins\DynamicMesh\Selections\FGeometrySelectionDelta) & DeltaOut )